Include PathV1.h in files that use it.

This is preparation for replacing Path.h with PathV2.h.

llvm-svn: 183782
diff --git a/llvm/tools/bugpoint/ToolRunner.h b/llvm/tools/bugpoint/ToolRunner.h
index bb83ce45..28c09f5 100644
--- a/llvm/tools/bugpoint/ToolRunner.h
+++ b/llvm/tools/bugpoint/ToolRunner.h
@@ -21,6 +21,7 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/PathV1.h"
 #include "llvm/Support/SystemUtils.h"
 #include <exception>
 #include <vector>